Hinge with defined halt positions

Abstract

Hinge for supporting and maneuvering doors, consisting of two wing-shaped elements, provided with means for the attachment to a frame part and to a door part, respectively, as well as with means for the mutual hinging of in a pivoting area, said means consisting of appendixes projecting from said wing-shaped elements, characterized in that at least one of said appendixes of a first one of said wings is shaped as a cylindrical body on the surface of which there are formed axial grooves, at a preset, mutual, circumferential distance, and in that with a second one of said wings, opposite to said appendix, there is associated at least one thrust-engagement element in one of said grooves, at least partly elastically yielding.

The invention claimed is: 
     
       1. A hinge for supporting and maneuvering doors,
 consisting of two wing-shaped elements for fastening to a frame part and to a door part respectively, each of said wing-shaped elements including at least one appendix projecting therefrom, a hinge pin pivotally connecting said wing-shaped elements together for fastening to a frame part and to a door part, respectively, and for mutual hinging about a pivoting axis in a pivoting area, 
 wherein at least one of said appendixes of a first one of said wings is shaped as a cylindrical body on the surface of which there are formed axial grooves, said grooves being disposed at a circumferential distance from each other, and in that with a second one of said wings, opposite to said at least one of said appendixes, there is at least one push element engagement with one of said grooves, at least partially elastically yielding for selective engagement with one of said grooves to prevent undesired hinge rotation, 
 and wherein said at least one push element consists of a pair of ribs parallel to the pivoting axis of the hinge, said ribs being kept together by elastically yielding connecting elements. 
 
     
     
       2. The hinge as claimed in  claim 1 , wherein one of said ribs intended for engagement with a respective one of said grooves, has a substantially polygonal section, with an angle forming an engagement wedge. 
     
     
       3. The hinge as claimed in  claim 1 , wherein said elastically yielding connection elements consist of elements each forming a closed, curved line having a symmetrical configuration with respect to a median axis perpendicular to said two ribs. 
     
     
       4. The hinge as claimed in  claim 3 , wherein said curved line is an ellipsis having its major axis parallel to said two ribs. 
     
     
       5. The hinge as claimed in  claim 1 , wherein said elastically yielding connection elements consist of a pair of elements, each being substantially V-shaped, opposite by their vertexes. 
     
     
       6. The hinge as claimed in  claim 5 , wherein each of said V-shaped connection elements has a vertex widely connected in an arc shape, said connection elements departing from the ribs ends and converging with their vertexes to the center. 
     
     
       7. The hinge as claimed in  claim 1 , wherein said connecting elements further comprises at least one dampening element shaped to engage the inner contours of said connection elements. 
     
     
       8. The hinge as claimed in  claim 1 , wherein said hinge pin further comprises at least one torsion spring housed in correspondence of the pivoting area and prepared to always push the wing-shaped elements into a secure position corresponding to the engagement of said push element with one of the grooves. 
     
     
       9. The hinge as claimed in  claim 8 , wherein said at least one torsion spring consist of:
 a pair of coaxially opposite springs, kept separate, but in mutual engagement at their respective proximal ends, by a double-prong retaining element, said element being anchored to a first one of said wing elements, 
 said springs being anchored with their distal ends on a pair of bottoms closing the outer ends of said second one of said wing elements. 
 
     
     
       10. The hinge as claimed in  claim 9 , wherein at least one of said bottoms is engaged with a respective end of said second wing element, said mutual engagement being accomplished by protrusions provided at regular intervals on the outer circumferential edge of the at least one of sad bottoms and by recesses housing said protrusions, respectively, provided on the inner circumferential edge of said respective end of the second wing element.